From 2a68dea2509854358f1ec5f54507147b4a19c747 Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Sun, 2 Jul 1995 01:59:30 +0000
Subject: Formerly sock.c.~3~

---
 pflocal/sock.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 89 insertions(+), 17 deletions(-)

diff --git a/pflocal/sock.c b/pflocal/sock.c
index 968ec460..14936513 100644
--- a/pflocal/sock.c
+++ b/pflocal/sock.c
@@ -54,31 +54,103 @@ sock_aquire_write_pipe (struct sock *sock)
   return pipe;
 }
 
+/* ---------------------------------------------------------------- */
+
+/* Return a new socket with the given pipe ops in SOCK.  */
 error_t
-sock_create (int type, struct sock *result)
+sock_create (struct pipe_ops *pipe_ops, struct sock **sock)
 {
   static unsigned next_sock_id = 0;
-  struct sock *sock = malloc (sizeof (struct sock));
+  struct sock *new = malloc (sizeof (struct sock));
 
-  if (sock == NULL)
+  if (new == NULL)
     return ENOMEM;
 
-  sock->refs = 0;
-  sock->read_pipe = sock->write_pipe = NULL;
-  sock->id = next_sock_id++;
-  bzero (&sock->change_time, sizeof (sock->change_time));
-  mutex_init (&sock->lock);
+  new->refs = 0;
+  new->read_pipe = new->write_pipe = NULL;
+  new->id = next_sock_id++;
+  new->pipe_ops = pipe_ops;
+  new->listenq = NULL;
+  new->addr = NULL;
+  bzero (&new->change_time, sizeof (new->change_time));
+  mutex_init (&new->lock);
+
+  *sock = new;
+  return 0;
+}
+
+void
+sock_free (struct sock *sock)
+{
+  
+}
+
+/* Return a new user port on SOCK, in PORT and PORT_TYPE.  */
+error_t
+sock_create_port (struct sock *sock,
+		  mach_port_t *port, mach_msg_type_name_t *port_type)
+{
+  struct sock_user *user =
+    port_allocate_port (sock_user_bucket,
+			sizeof (struct sock_user), sock_user_class);
+
+  if (!user)
+    return ENOMEM;
+
+  mutex_lock (&sock->lock);
+  sock->refs++;
+  mutex_unlock (&sock->lock);
+
+  user->sock = sock;
+
+  *port = ports_get_right (user);
+  *port_type = MACH_MSG_TYPE_MAKE_SEND;
+
+  return 0;
+}
+
+/* ---------------------------------------------------------------- */
 
-  switch (type)
+/* We hold this lock when we want to lock both sockets for a attach
+   operation, to avoid another attach with the sockets reversed happening.
+   Attach should be the only place trying to lock two sockets at once, so
+   this should be safe...  */
+static struct mutex connect_lock;
+
+/* Connect together the previously unconnected sockets SOCK1 and SOCK2.  */
+error_t
+sock_connect (struct sock *sock1, struct sock *sock2)
+{
+  if (sock1->pipe_ops != sock2->pipe_ops)
+    return EOPNOTSUPP;		/* XXX?? */
+
+  mutex_lock (&connect_lock);
+  mutex_lock (&sock1->lock);
+  mutex_lock (&sock2->lock);
+
+  if (sock1->read_pipe || sock1->write_pipe
+      || sock2->read_pipe || sock2->write_pipe)
+    err = EISCONN;
+  else
     {
-    case SOCK_STREAM:
-      sock->pipe_ops = stream_pipe_ops; break;
-    case SOCK_DGRAM:
-      sock->pipe_ops = dgram_pipe_ops; break;
-    default:
-      free (sock);
-      return ESOCKTNOSUPPORT;
+      struct pipe *pipe1, *pipe2;
+      err = pipe_create (sock1, sock2, sock1->pipe_ops, &pipe1);
+      if (!err)
+	{
+	  err = pipe_create (sock2, sock1, sock1->pipe_ops, &pipe2);
+	  if (err)
+	    pipe_free (pipe1);
+	}
+      if (!err)
+	{
+	  sock1->write_pipe = sock2->read_pipe = pipe1;
+	  sock2->write_pipe = sock1->read_pipe = pipe2;
+	}
     }
 
-  return 0;
+  mutex_unlock (&sock2->lock);
+  mutex_unlock (&sock1->lock);
+  mutex_unlock (&connect_lock);
+
+  return err;
 }
-- 
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